#!/bin/bash

### BEGIN INIT INFO
# Provides:          helios-master
# Required-Start:    networking
# Required-Stop:     networking
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Helios master daemon
# Description:       Helios master daemon.
### END INIT INFO

. /lib/lsb/init-functions
NAME=helios-master
DAEMON=/usr/bin/helios-master
PIDFILE=/var/run/helios-master.pid
DEFAULTFILE=/etc/default/helios-master

# If the daemon is not there, then exit.
test -x $DAEMON || exit 5

# upstart should be used to control the daemon if available
if which initctl >/dev/null && initctl version | grep -q upstart; then
 log_failure_msg "Upstart should be used to control $NAME (sudo initctl stop/start $NAME)!"
 exit 5
fi

case $1 in
 start)
  # Checked the PID file exists and check the actual status of process
  if [ -e $PIDFILE ]; then
   status_of_proc -p $PIDFILE $DAEMON "$NAME process" && status="0" || status="$?"
   # If the status is SUCCESS then don't need to start again.
   if [ $status = "0" ]; then
    exit # Exit
   fi
  fi
  [ -f $DEFAULTFILE ] && . $DEFAULTFILE
  # don't start unless explicitly enabled in config
  if [ -z "$ENABLED" ] ; then
   log_daemon_msg "$NAME not enabled"
   log_end_msg 0
   exit 0
  fi
  # Start the daemon.
  log_daemon_msg "Starting the process" "$NAME"
  # Start the daemon with the help of start-stop-daemon
  # Log the message appropriately
  if start-stop-daemon -b -m --start --quiet --oknodo --pidfile $PIDFILE --exec $DAEMON -- $HELIOS_MASTER_OPTS; then
   log_end_msg 0
  else
   log_end_msg 1
  fi
  ;;
 stop)
  # Stop the daemon.
  if [ -e $PIDFILE ]; then
   status_of_proc -p $PIDFILE $DAEMON "Stoppping the $NAME process" && status="0" || status="$?"
   if [ "$status" = 0 ]; then
    start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
    /bin/rm -rf $PIDFILE
   fi
  else
   log_daemon_msg "$NAME process is not running"
   log_end_msg 0
  fi
  ;;
 restart)
  # Restart the daemon.
  $0 stop && sleep 2 && $0 start
  ;;
 status)
  # Check the status of the process.
  if [ -e $PIDFILE ]; then
   status_of_proc -p $PIDFILE $DAEMON "$NAME process" && exit 0 || exit $?
  else
   log_daemon_msg "$NAME Process is not running"
   log_end_msg 0
  fi
  ;;
 *)
  # For invalid arguments, print the usage message.
  echo "Usage: $0 {start|stop|restart|status}"
  exit 2
  ;;
esac
